Gist to prevent computer lockup

UnlockScreenApplication.java

import java.awt.*;

public class UnlockScreenApplication {

    public static void main(String[] args) throws Exception {
        Robot robot = new Robot();

        while (true) {
            robot.delay(40000);
            Point currentLocation = MouseInfo.getPointerInfo().getLocation();
            int randomX = getRandomIntBetweenMinusOneAndOne();
            int randomY = getRandomIntBetweenMinusOneAndOne();
            robot.mouseMove(currentLocation.x + randomX, currentLocation.y + randomY);
        }
    }

    private static int getRandomIntBetweenMinusOneAndOne() {
        return (int) (Math.random() - Math.random());
    }
}